Discontinued Legacy Addons for Firefox

Firefox Quantum has been released a few days ago. The new update from Mozilla is one met with excitement from many users, for good reason. Firefox Quantum is extremely fast, gives you a smooth browsing experience, comes with a polished interface, and finally drops Small Yahoo! Search iconYahoo! Search as the default search engine (Sorry Yahoo, it was time for you to go). There were, however, many users who were frustrated with the new update, as many of the add-ons that made Firefox so useful are no longer supported in the Quantum update.

Firefox Quantum uses the new WebExtensions API, while many add-ons use the older API that is no longer supported in the updated version. This comes as a disappointment, especially for power-users who enjoyed Firefox for the powerful add-ons that were created for it, such as Small Firebug iconFirebug or Small FlashGot iconFlashGot . So if you're one of the users that is unhappy about the lack of backwards compatibility, what can you do?

First, you can search for an alternative extension. Luckily, Firefox makes this pretty easy. If you go into "Add-Ons" from the Firefox menu, you'll see your current add-ons. If you aren't seeing add-ons that you previously had installed, before the update, then it is likely they aren't supported in the new version. If this is the case, you can find them by clicking "Legacy Extensions" on the left-hand side of the page. You should see something similar to the screenshot below (depending on the add-ons installed, of course):

Firefox Add-On Settings

As you can see, if you have an unsupported legacy add-on installed, Firefox now gives you the ability to "Find a Replacement." Which you can do by clicking the respective button, on the right-hand side of the add-on. From there, you'll be taken to a page where you can browse alternative add-ons for the unsupported legacy add-on. In most cases, for most add-ons, this works well and you are likely to be able to find a suitable replacement for the add-on you were attached to.

Second option, you can wait and hope that the developers port the legacy add-on to the new WebExtensions API. Unfortunately, some add-on developers have already announced that they won't be porting to support WebExtensions API, such as Small Firebug iconFirebug and Small Selenium IDE iconSelenium IDE . Others have announced that updates are in the works, such as Small LastPass iconLastPass and Small Greasemonkey iconGreasemonkey , so be sure to check out the website for your favorite add-on to see what the status on an update is.

Finally, if the above two options don't work for you, you can always find and switch to an alternative web browser. You can check out the possible alternatives to Small Mozilla Firefox iconMozilla Firefox . But before you think about making the switch to another browser, you should know that Firefox Quantum is an incredible leap forward for Firefox. The improvements are tremendous, and Mozilla's commitment to ensuring future stability with the browser is clear - you may want to stick around with Firefox.

Here is a list of some of the top add-ons that will not be updated and therefore will not work in Firefox Quantum:

  • Download Status Bar icon

    Download Status Bar

    Free Mac OS X Windows Linux Pale Moon Thunderbird ... SeaMonkey Firefox Website

    Download Status Bar manages every aspect of your downloads (Launch, Show, Scan, Send To, Rename, Checksum, Pause, Resume, Cancel, Clean, Delete), generates Statistics from your Download actions, keeps the History of your previous session downloads and much more. It is not only a download management add-on but a helper tool for boosting your Productivity, too.


  • Clean Uninstall icon

    Clean Uninstall

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    "Clean Uninstall" cleans fingerprints (such as preferences) left by an add-on from your Firefox profile upon its removal. Usually add-on developers do not clear preferences created by their extension just before extension gets uninstalled. This leads to have a massive pref.js file once you have tried a few extensions. So after trying out a few extensions, although you have removed them, but your Firefox is not as responsive as it used to be. This extension notifies you about these preferences after an extension got removed.


    Light-weight on resources
    No UI element is added to Firefox to prevent decluttering
    Allows you to remove extension's fingerprints


  • Firebug icon


    Free Mac OS X Windows Linux Firefox Website

    Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.

    Firebug is always just a keystroke away, but it never gets in your way. You can open Firebug in a separate window, or as a bar at the bottom of your browser. Firebug also gives you fine-grained control over which websites you want to enable it for.

    Firebug makes it simple to find HTML elements buried deep in the page. Once youve found what youre looking for, Firebug gives you a wealth of information, and lets you edit the HTML live.


  • FireFTP icon


    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.


  • FlashGot icon


    Free Mac OS X Windows Linux Pale Moon Thunderbird ... Firefox Website

    FlashGot is the free add-on for Firefox and Thunderbird to capture and download embedded links for all types of files (not just flash movies).
    -Capture all links from a page
    -Capture all links from all tabs
    -Make a selection on a web page and capture all links in that selection.
    -Filter the links using a mask (e.g. to download only certain types of files)
    -Pass on the links to your favorite download manager
    -Turns every supported download manager into a download manager for Firefox

    You can check with your eyes the "cleanliness" of FlashGot source code downloading the XPI file and opening it with a ZIP utility (inside there's also a JAR you want to unarchive). It is all JavaScript/XUL with a single C++ file (FlashGot.cpp), which is the source of FlashGot.exe.


  • Self-Destructing Cookies icon

    Self-Destructing Cookies

    Free Mac OS X Windows Linux Android Waterfox ... Pale Moon Firefox Website

    Self-Destructing Cookies is not just a cookie manager, it's a new cookie policy. Do you think that cookies should need a reason to persist in your cookie jar, i.e. you currently interacting with the site that set them? Would you prefer your cookie jar to be empty in its steady state, except for a few sites that you care about? Are you worried about unconventional tracking methods? Then give this add-on a try.

    Self-Destructing Cookies automatically removes cookies when they are no longer used by open browser tabs. With the cookies, lingering sessions, as well as information used to spy on you, will be expunged. Websites will only be permitted to identify you while you actually use them and can not stalk you across the entire web. This is the closest you will get to cookieless browsing without breaking every second site or tedious micromanaging.

    Tracking cookies will be detected and removed immediately. They are identified purely by their behaviour - no need for a blacklist that needs to be kept up to-date. Self-Destructing Cookies also has LocalStorage support and will treat it just like your cookie jar. Defend yourself against ETag tracking and other cache-based black-hat techniques by configuring Self-Destructing Cookies to automatically clean your cache every time you are not actively using the browser. For the first time ever, this provides a realistic chance of beating zombie-/evercookies without sacrificing usability. See the zombie-cookie FAQ entry for details. Self-Destructing Cookies can also help protect against CSRF attacks by ending your sessions as soon as possible.

    This add-on complements blacklist-based solutions such as Adblock and Ghostery very well. You can whitelist sites whose cookies and LocalStorage you would like to keep without an active tab in the Firefox cookie exception list, which can also be conveniently accessed from the add-on's preferences, or an icon in the Add-on Bar.


  • Session Manager icon

    Session Manager

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    Session Manager saves and restores the state of all windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.


  • BetterPrivacy icon


    Free Mac OS X Windows Linux Firefox Website

    Better Privacy serves to protect against not deletable longterm cookies, a new generation of Super-Cookie, which silently conquered the internet. This new cookie generation offers unlimited user tracking to industry and market research. Concerning privacy Flash- and DOM Storage objects are most critical. This addon was made to make users aware of those hidden, never expiring objects and to offer an easy way to get rid of them - since browsers are unable to do that for you.


  • Lazarus Form Recovery icon

    Lazarus Form Recovery

    Free Mac OS X Windows Linux Chrome Safari ... Waterfox Pale Moon Firefox Website

    The ultimate web-form recovery solution. Lazarus automagically encrypts and saves web-form data as you type, so that when a form submission fails, your browser crashes, or something else goes horribly wrong, you can skip the hair pulling, return to the page you were on, click the Lazarus icon, and recover all your work, just like magic!


  • Random Agent Spoofer icon

    Random Agent Spoofer

    Free Mac OS X Windows Linux Firefox Website

    Random Agent Spoofer is a privacy enhancing Firefox addon which aims to hinder browser fingerprinting. It does this by changing the browser/device profile on a timer. Each browser profile has been tailored to match the actual values used by the target browser as much as possible, within the limits set by firefox.

    It also supports other privacy enhancing options.


  • FireSSH icon


    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    FireSSH is a free, cross-platform SSH terminal client for Mozilla Firefox. Written entirely in Javascript!


  • All-in-One Sidebar icon

    All-in-One Sidebar

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    All-in-One Sidebar (AiOS) is a sidebar control, inspired by Small Opera iconOpera . Click on the left edge of your browser window to open the sidebar and get easy access to all your panels. It lets you quickly switch between sidebar panels, view dialog windows such as downloads, add-ons, and more in the sidebar, or view source code or websites in the sidebar. It includes a slide-out button


  • FireTray icon


    Free Windows Linux Waterfox Pale Moon Thunderbird ... SeaMonkey Firefox Website

    FireTray is system tray extension for Linux and Windows that targets Small Mozilla Firefox iconMozilla Firefox, Small Thunderbird iconThunderbird and Small SeaMonkey iconSeaMonkey. It provides a system tray icon with much window handling functionality. For mail applications, the icon can show the number of unread or new messages. FireTray is very customizable.


  • Menu Wizard icon

    Menu Wizard

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Thunderbird SeaMonkey Firefox Website

    Customize menus : Helps removing, moving and renaming menus and menu items
    New feature: Now you can change or disable any of used keyboard shortcuts
    Support: Firefox, Thunderbird and SeaMonkey


  • Tab Scope icon

    Tab Scope

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    Shows a popup on tabs and enables you to preview and navigate tab contents through popup. Major features are:

    • Real-time preview of tab contents
    • Navigate (Back/Forward/Reload/Stop) through popup
    • Scroll pages or frames in preview with mouse wheel
    • Click links or buttons directly in preview
    • Automatically show preview for tabs opened in background


  • FindBar Tweak icon

    FindBar Tweak

    Free Mac OS X Windows Linux Waterfox Firefox Website

    Tweak your FindBar the way you like it!

    Main features:

    • Moving findbar to the top of the browser,
    • Highlight markers on scrollbar (like in Chrome) also in page source viewer,
    • Find in all open tabs with showing context of found items,
    • Total hits and current hit counter in the findbar,
    • Focus sights on the current hit,
    • Its features works with PDF.js,


  • Torrent Tornado icon

    Torrent Tornado

    Free Mac OS X Windows Linux SeaMonkey Firefox Website

    Torrent Tornado is a BitTorrent client for Firefox and SeaMonkey that allows users to download Torrents directly from their browser without any additional software.

    Torrent Tornado can download Torrents directly to your Downloads folder and can handle large files (multi-gigabyte files) with ease.


    • Magnet-URI association
    • .torrent file-type association
    • drag&drop torrent-link (or magnet-link or local file or file from statusbar of Small Download Manager (S3) iconDownload Manager (S3) ) to toolbar-button "Torrent Tornado"


  • ReminderFox icon


    Free Mac OS X Windows Linux Waterfox Pale Moon ... Thunderbird Firefox Website

    ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.


  • ReloadEvery icon


    Free Mac OS X Windows Linux BSD Firefox Website

    The ReloadEvery extension adds the funcionality to reload the web page you are viewing every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (in Firefox 4.0)

    Randomize feature: if you enable Randomize and have reload time set to 10s it will randomly take somewhere between 5 to 15 seconds


  • Omnibar icon


    Free Mac OS X Windows Linux Pale Moon Firefox Website

    Integrates location bar and search bar into one. Shows search and url suggestions. Quickly switch search engine using search keywords. Provides different auto-complete popup styles for compact displays.


  • Classic Theme Restorer icon

    Classic Theme Restorer

    Free Mac OS X Windows Linux Firefox Website

    Classic Theme Restorer is a Small Mozilla Firefox iconMozilla Firefox extension that was created in response to the negative feedback against the introduction of the Australis theme in Firefox 29: since then, the main purpose of Classic Theme Restorer is to restore old user interface features that no longer come with current versions of Mozilla-based browsers.

    The main attractions of Classic Theme Restorer include the restoration of squared tabs and the addon bar, both of which were removed following the introduction of the Australis theme in Firefox 29. Classic Theme Restorer also enables users to customise the interface layout in ways that are not possible in current releases.


  • Tamper Data icon

    Tamper Data

    Free Mac OS X Windows Linux Firefox Website

    Firefox add-on that lets you change headers and request parameters before they're sent to the server. Unlike proxy request modifiers, it's integrated into the browser, so it has no problem with HTTPS connections, client authentication certificates, or other features that the browser supports.


  • TableTools2 icon


    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    Does everything for HTML tables: Copy (table/row/column/cell), Sort (multi-column), Search (regex, range operations ...), Filter, Chart (bubble, line, pie, histogram ...), Statistics, Rearrange (column/row), Combine & Compare. Replaces TableTools.


  • Status-4-Evar icon


    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    That status bar was removed in Firefox 4.0. While some of the status bar items did find new homes, some did not, and you might not like where they ended up. There were also some nice innovations during the development of Firefox 4.0, such as progress/links/status in the location bar, which unfortunately didn't make it to the final release.

    Status-4-Evar aims to bring back (some of) the old status bar items, give you more control over the built-in Firefox features, and provide new alternatives.

    The extension provides "Status Text", "Progress Meter", and "Download Status" items. These toolbar items can be moved wherever you want by customizing the toolbars. Behavior of the toolbar items, and other additional settings, can be controlled in the extension preferences.

    This extension can also act as a replacement for the Fission extension. There are preferences to show links, status, and progress in the location bar instead of the toolbar items.


  • Multi Links Plus icon

    Multi Links Plus

    Free Mac OS X Windows Linux BSD Waterfox ... Pale Moon Firefox Website

    Multi Links Plus lets you open, copy or bookmark multiple links at the same time rather than having to do them all individually.

    To open, copy or bookmark links, you simply right click and hold to drag a box around the links to desire to take action on. When you release the right mouse button, you will open/copy/bookmark those links.

    To choose whether you open, copy or bookmark links inside the Multi Links Plus options. Open links in new tabs is the default action which can also be changes to open in new windows.

    Inside options you can also fully customise the look and feel of Multi Links Plus such as colours, border styles and more.

    You can select groups of links in different areas of the page by using the shift or ctrl keyboard keys. This comes in handy if you want to open #1,2,3,4 and 7,8,9,10 in Google missing out #5 & 6 for example. You can either drag a box around them all and then use shift or ctrl to deselect #5 & 6 or select #1,2,3 & 4 and then hold shift or ctrl and draw another box around #7,8,9 & 10.

    Multi Links Plus comes in handy particularly with search engines such as Google, Yahoo and Bing as it automatically detects that you want to only open search results and not additional links such as "cached, similar & filter" but you can change this in options if you want.

    It's easy to cancel a selection by simple left clicking or pressing the Esc keyboard key and your selection will be cancelled.


  • Selenium IDE icon

    Selenium IDE

    Free Mac OS X Windows Linux Firefox Website

    Selenium IDE is an integrated development environment for Selenium tests. It is implemented as a Firefox extension, and allows you to record, edit, and debug tests. Selenium IDE includes the entire Selenium Core, allowing you to easily and quickly record and play back tests in the actual environment that they will run.

    Selenium IDE is not only a recording tool: it is a complete IDE. You can choose to use its recording capability, or you may edit your scripts by hand. With autocomplete support and the ability to move commands around quickly, Selenium IDE is the ideal environment for creating Selenium tests no matter what style of tests you prefer.


    Easy record and playback
    Intelligent field selection will use IDs, names, or XPath as needed
    Autocomplete for all common Selenium commands
    Walk through tests
    Debug and set breakpoints
    Save tests as HTML, Ruby scripts, or any other format
    Support for Selenium user-extensions.js file
    Option to automatically assert the title of every page
    Easy customization through plugins


  • Tab Groups icon

    Tab Groups

    Free Mac OS X Windows Linux Waterfox Firefox Website

    Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.


  • Private Tab icon

    Private Tab

    Free Mac OS X Windows Linux Waterfox Pale Moon ... SeaMonkey Firefox Website

    Adds private tabs, restartless extension for Firefox (20.0+) and SeaMonkey (2.17+)


  • Close'n forget icon

    Close'n forget

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    Very simple add-on that closes the current tab and make Firefox forget about the visit: suppressing cookies related to the current page, cleaning (beware : may be partial) the browser history and so on.


  • Messenger & Notifier for Facebook icon

    Messenger & Notifier for Facebook

    Free Mac OS X Windows Linux Chrome Waterfox ... Pale Moon Firefox Website

    Messenger & Notifier for Facebook is an easy way to check Small Facebook Messenger iconFacebook Messenger from your desktop machine. Clicking on the toolbar icon, renders messenger.com in a small UI attached to the toolbar popup. Moreover, you will get badge notification for all incoming messages.


  • QuickMark icon


    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    QuickMark provides a lightning-fast way for creating bookmarks and keeping them organized. Create and place them in a folder in one mouse sweep or use the shortcuts so your hands don't need to leave the keyboard.

    To create a bookmark simply click the star or press Ctrl + D (Command + D on Mac) to open the QuickMark panel. Here you will see a tree with all the folders that are available to your bookmarks. Click a folder directly to place you new bookmark or click the toggle next to the folder to view the other folders inside.


    Create bookmarks in the correct folder in 2 clicks.
    Press Ctrl + D (Command + D on Mac) to create a bookmark.
    Type the first letters of any displayed folder to select it.(Doesn't select from folders that are collapsed)
    Use the arrow keys to navigate the folder-tree. Right and left arrow to expand and contract a folder
    Enable the default bookmark menu in the options, allowing you to edit the bookmark's preferences when clicking the star-icon of an already bookmarked page.


  • Clear Console icon

    Clear Console

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    Clear Console addon provides options to clear your cookies, cache, history, html5/local storage, http logins, all of them or restart your browser in a single click.

    What are the features?

    Clear Cookies
    Clear Cache
    Clear History
    Clear Http Authentication
    Clear Html5 storage
    Clear all
    Restart the browser
    Clear all and Restart the browser
    Options to clear browser data upon shutdown
    Enable/Disable Notifications


  • Cookie Controller icon

    Cookie Controller

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    Buttons for managing site cookie permissions, switching global cookie permissions on and off, browsing cookies, and removing cookies. The same functions are included for local and session storage.


  • Beyond Australis icon

    Beyond Australis

    Free Mac Windows Linux Firefox Website

    Australis was the code name of the current Firefox theme, which first appeared in Firefox 29. It was an almost complete overhaul not only of the general look of the main browser window, but also of the underlying customization system. This add-on aims to fully and seamlessly integrate with Australis, while at same time provide a different, and hopefully better, feel when using the browser.


  • Puzzle Bars icon

    Puzzle Bars

    Free Mac OS X Windows Linux Waterfox Pale Moon ... Firefox Website

    This add-on provides a series of customizable toolbars for your browser, so that you can organize all of your buttons, icons and extras around your window just the way you want them. Every toolbar can be enabled or disabled in the add-on's options immediately. By choosing only the toolbars that you'll use, you can truly make your browser unique!

    When first installed, the toolbars will be empty. You can fill them in the same way you customize the rest of your browser; while in Customize view, just drag your icons and buttons to the exact place where you want them.

    Every toolbar comes with its own Puzzle Piece, which you can click to quickly open or close its toolbar. These puzzle pieces will hide away when the toolbar is closed, and will always be accessible by moving the mouse over to its location, so that you can easily open it whenever you need it. All the puzzle pieces are optional, and can be enabled or disabled in the add-on's options as well.

    Every toolbar also has its own keyboard shortcut, which you can change to your liking in the add-on's options to keep each puzzle bar at the distance of a finger!


We will be sure to update the list above if other popular add-ons announce they will not be releasing an update for compatibility with Firefox Quantum.

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